html - 标签中的 "for"是什么意思？

Question

刚刚在 HTML 标签中遇到了一个 for 参数:

<label for="required-firstname"> First Name </label>
<small>*</small>
<input name="required-firstname" type="text" tabindex="2" 
       id="required-firstname" size="24" maxlength="40">

我正在将此表单转换为 PHP 处理的脚本，我可以去掉 for= 参数吗？(出于好奇，它有什么作用？)

Answer 1

来自 w3schools.org:

The tag defines a label for an input element.

The label element does not render as anything special for the user. However, it provides a usability improvement for mouse users, because if the user clicks on the text within the label element, it toggles the control.

The for attribute of the tag should be equal to the id attribute of the related element to bind them together.

喂!

将我的 $.02 添加为可访问性 SME - 以及可用性，LABEL 还将输入字段与正确的标签相关联，以便使用屏幕阅读器的人知道该字段的用途。